WHO Declare Africa Polio Free
'A momentous milestone': Africa now free from wild polio virus Experts hail public health achievement, urge vigilance over existing threat posed by polio vaccine-derived outbreaks. Health authorities have declared Africa free of the wild polio virus after decades of efforts, a major step in the campaign to eradicate the crippling viral disease worldwide. Tuesday's historic announcement by the African Regional Certification Commission for Polio Eradication during a World Health Organization (WHO) event came four years after the continent's last case was reported in northern Nigeria. The commission, an independent body, confirmed that all 47 countries in the WHO's Africa region have eradicated the disease that attacks the nervous system and can cause irreversible paralysis within hours. The news was hailed by health experts, who also urged continued vigilance over the still-existing threat posed by polio vaccine-derived outbreaks in more than a dozen countri...